Solar seawater desalination co-production system

Abstract

The invention discloses a solar seawater desalination co-production system which is characterized in that an atomization evaporation system comprises a water storage heating tank, an atomization heating evaporation chamber and an electrostatic atomization unit, the water storage heating tank heats input seawater, and the electrostatic atomization unit crushes the heated seawater in the water storage heating tank into fog drops with micron-scale and even nano-scale inner diameters; the brine is sprayed into the atomization heating evaporation chamber and is evaporated in the atomization heating evaporation chamber to obtain water vapor and low-concentration brine; the heat exchange condensation system is used for condensing water vapor generated by the atomization evaporation system into fresh water; the re-evaporation system inputs the low-concentration brine into the atomization evaporation system for re-evaporation to obtain high-concentration brine; the whole system is powered by a photovoltaic energy storage system. According to the system, photovoltaic energy storage, electrostatic atomization, heat exchange condensation and the like are coupled, energy is supplied to the system through photovoltaic energy storage, the seawater evaporation efficiency is improved through electrostatic atomization, and steam waste heat is fully utilized in the heat exchange condensation process; the system is simple in structure and wide in application range.

Description

Technical Field

[0001] The invention relates to the technical field of charged spraying and seawater desalination, and in particular to a solar seawater desalination cogeneration system. Background Art

[0002] Seawater desalination is a water treatment technology that uses a specific process to remove most of the salts contained in seawater to make it meet the standards for living and production water. Conventional methods include distillation, reverse osmosis membrane, dialysis, ion exchange and freezing. Seawater desalination is not limited by climate and time and space conditions. It relies on inexhaustible seawater resources and can fundamentally solve the problem of water shortage.

[0003] However, there are still many problems that need to be solved in seawater desalination. For example, seawater desalination is a major investment project with high consumption and energy consumption, and is mainly concentrated around developed cities.

[0004] Conventional seawater desalination devices use mechanical atomization as the liquid atomization method, that is, the liquid surface is broken by external forces to form many fine particles, which has high energy consumption and uneven dispersion of droplet particles.

[0005] Therefore, it is of great significance to provide a seawater desalination device with a simple energy design structure and a wide range of trials. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present application proposes a solar desalination cogeneration system, which couples photovoltaic energy storage, electrostatic atomization, heat exchange condensation, etc., uses photovoltaic energy storage to power the system, uses electrostatic atomization to improve the evaporation efficiency of seawater, and fully utilizes the waste heat of steam in the heat exchange condensation process; the system has a simple structure and a wide range of applications.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A solar seawater desalination cogeneration system, comprising: a photovoltaic energy storage system, an atomization evaporation system, a heat exchange condensation system and a re-evaporation system;

[0009] The atomization evaporation system comprises a water storage and heating box, an atomization heating evaporation chamber, and an electrostatic atomization unit. The water storage and heating box heats the input seawater. The electrostatic atomization unit is arranged between the water storage and heating box and the atomization heating evaporation chamber. The electrostatic atomization unit breaks the seawater heated in the water storage and heating box into droplets with an inner diameter of micrometers or even nanometers, and sprays them into the atomization heating evaporation chamber, where they evaporate to obtain water vapor and low-concentration brine.

[0010] The heat exchange condensation system condenses the water vapor generated by the atomization evaporation system into fresh water;

[0011] The re-evaporation system inputs low-concentration brine into the atomization evaporation system for re-evaporation to obtain high-concentration brine;

[0012] The photovoltaic energy storage system converts solar energy into electrical energy and supplies energy to electrical equipment in the atomization evaporation system, the heat exchange condensation system and the re-evaporation system.

[0013] Furthermore, a constriction is provided in the atomizing heating evaporation chamber, a waterproof breathable membrane is provided on one side of the constriction, and the other side is connected to the heat exchange condensation system. The steam and the atomized droplets are separated by the waterproof breathable membrane and then input into the heat exchange condensation system.

[0014] Furthermore, the electrostatic atomization unit includes a high-voltage electrostatic generator, an annular electrode and a nozzle; the annular electrode is connected to the high-voltage electrostatic generator to form a high-voltage electric field around the annular electrode; the nozzle is arranged at the center of the annular electrode; the inlet end of the nozzle is connected to the water storage and heating box, and the outlet end of the nozzle faces the atomization heating evaporation chamber.

[0015] Furthermore, the heat exchange condensation system includes a heat exchanger, a condenser, and a fresh water collection bottle; the water vapor inlet of the heat exchanger is connected to the atomization heating evaporation chamber through a pipeline, and the water vapor outlet of the heat exchanger is connected to the condenser and the fresh water collection bottle in sequence; the condenser is placed in a condensation box.

[0016] Furthermore, the condensing tank is connected to the heat exchanger and the water storage heating tank in sequence through pipelines. Seawater is used as a heat exchange medium in both the condensing tank and the heat exchanger. The seawater is preheated in multiple stages by the condensing tank and the heat exchanger and then input into the water storage heating tank.

[0017] Furthermore, the re-evaporation system includes a low-concentration brine collection box and a high-concentration brine collection box. The low-concentration brine collection box is connected to the bottom of the atomizing heating evaporation chamber and is used to receive the low-concentration brine produced by the atomizing heating evaporation chamber; the low-concentration brine collection box is also connected to the atomizing evaporation system to input the low-concentration brine into the atomizing evaporation system for secondary evaporation; the high-concentration brine collection box is used to collect the high-concentration brine produced after the secondary evaporation.

[0018] Furthermore, the photovoltaic energy storage system includes a solar panel and an energy storage battery. The solar panel converts solar energy into electrical energy and is connected to the energy storage battery through a wire. The converted electrical energy can be stored and the energy storage battery supplies energy to the electrical equipment in the system. Furthermore, the photovoltaic energy storage system is equipped with an orientation adjustment system, which adjusts the orientation of the solar panel.

[0019] Furthermore, filter screens are provided at the seawater inlet and outlet of the condensation box.

[0020] Furthermore, the outer walls of the water storage and heating box and the atomizing and evaporating chamber are covered with an insulating and heat-preserving layer.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention adopts photovoltaic panel power generation device to replace ordinary power supply, stores electric energy through battery, realizes seawater desalination throughout the day, can be placed on ships and islands, provides fresh water required for offshore work, and can achieve the goals of high efficiency, energy saving, environmental protection and zero carbon.

[0023] 2. The electrostatic atomization multi-nozzle seawater desalination device of the present invention can produce a "simple-jet" mode atomization with a large flow rate and a droplet size in the sub-millimeter range, which makes up for the two limitations of the cone jet mode in the early design that it is difficult to obtain a high liquid flux and the aqueous solution is difficult to form a stable cone jet, greatly improving the efficiency of seawater desalination.

[0024] 3. The present invention combines electrostatic atomization technology with photovoltaic power supply technology and charged droplet evaporation technology, and utilizes electrostatic atomization technology to generate good monodispersity of droplets to improve the working efficiency of the evaporation and distillation process in seawater desalination, increase the gas-liquid contact area and induce the droplet surface to achieve the purpose of increasing evaporation efficiency.

[0025] 4. The setting of the re-evaporation device of the present invention can perform secondary desalination on the treated brine, greatly improve the utilization rate and desalination effect of seawater, and obtain highly concentrated brine by-products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a small-scale solar desalination co-generation system proposed by the present invention.

[0027] Figure 2 Schematic diagram of the ring electrode structure in the atomization evaporation system.

[0028] Figure 3 This is the flow chart of desalination of seawater in the solar desalination cogeneration system.

[0029] In the figure: 1-solar panel; 2-motor; 3-connecting rod; 4-energy storage battery; 5-water storage heating box; 6-ring electrode; 7-high voltage electrostatic generator; 8-nozzle; 9-neck shrinkage; 10-waterproof breathable membrane; 11-atomizing heating evaporation chamber; 12-pressure relief valve; 13-low concentration brine collection box; 14-pressure sensor; 15-proportional valve; 16-high concentration brine collection box; 17-valve; 18-interface; 19-injection pump; 20-air pump; 21-plate heat exchanger; 22-first execution valve; 23-second execution valve; 24-condenser; 25-condenser box; 26-fresh water collection bottle. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] Figure 1 This is a structural schematic diagram of a solar seawater desalination co-production system proposed in the present invention, the system includes: a photovoltaic energy storage system, an atomization evaporation system, a heat exchange condensation system and a re-evaporation system, wherein the photovoltaic energy storage system converts solar energy into electrical energy for storage and provides energy for the operation of the entire system; the atomization evaporation system electrostatically atomizes the heated seawater to obtain water vapor and low-concentration brine; the heat exchange condensation system condenses the water vapor generated by the atomization evaporation system into fresh water; the re-evaporation system re-evaporates the low-concentration brine to obtain high-concentration brine.

[0033] The photovoltaic energy storage system includes a solar panel 1 and an energy storage battery 4. The solar panel 1 converts solar energy into electrical energy and is connected to the energy storage battery 4 via a wire. The converted electrical energy can be stored and the energy storage battery 4 supplies energy to the electrical equipment in the system.

[0034] More specifically, in order to improve the power generation efficiency of the photovoltaic energy storage system, the present invention equips the photovoltaic energy storage system with a direction adjustment system, which can realize its automatic pursuit of sunlight. The direction adjustment system includes a spectrometer, a microcontroller, a connecting rod 3, a rotating component and a motor 2; wherein, the spectrometer is located in the solar panel 1, and is used to detect the light intensity and identify the light intensity direction; the bottom of the solar panel 1 is connected to the connecting rod 3. The microcontroller is placed in the connecting rod 3, and the microcontroller is connected to the spectrometer signal, receives the light intensity obtained by the spectrometer, and outputs a steering instruction according to the light intensity. The connecting rod 3 is connected to the motor 2 through a rotating component, and the motor 2 signal is connected to the microcontroller. According to the steering instruction output by the microcontroller, the rotating component drives the connecting rod 3 and the solar panel 1 to rotate together. The solar panel 1 always ensures that the sunlight is perpendicular to the surface of the collector tube to maximize the light intensity received by the solar panel 1, thereby improving the power generation efficiency. The rotating component in this embodiment can be driven by a gear ring.

[0035] The atomization evaporation system includes a water storage and heating box 5, an atomization heating evaporation chamber 11, and an electrostatic atomization unit; wherein the water storage and heating box 5 is connected to the seawater supply unit through an injection pump 19 and a pipeline, and the seawater to be treated is input into the water storage and heating box 5. A heater is provided in the water storage and heating box 5, and the seawater in the water storage and heating box 5 is heated by the heater to prepare for electrostatic atomization and evaporation in the atomization heating evaporation chamber 11 in the next step. The electrostatic atomization unit is arranged between the water storage and heating box 5 and the atomization heating evaporation chamber 11, and the electrostatic atomization unit breaks the heated seawater in the water storage and heating box 5 into droplets with an inner diameter of micrometers or even nanometers, and sprays them into the atomization heating evaporation chamber 11. A heater is provided in the atomization heating evaporation chamber 11 to accelerate the evaporation of seawater.

[0036] More specifically, in conjunction with Figure 2 The electrostatic atomization unit includes a high-voltage electrostatic generator 7, an annular electrode 6 and a nozzle 8; the positive end of the high-voltage electrostatic generator 7 is connected to the annular electrode 6, and the negative end is grounded; the annular electrodes 6 can be provided in multiples and connected to each other, and a high-voltage electric field is formed around each annular electrode 6, and the annular electrode 6 is embedded in a non-metallic material to ensure the insulation of the annular electrode 6. The annular electrode 6 surrounds each nozzle 8, but does not contact the annular electrode. The heated seawater flows through the nozzle 8 of the high-voltage electric field and is broken into droplet particles of micrometer or even nanometer size, and then is sprayed on the inner wall of the atomization heating evaporation chamber 11, waiting for further heating and evaporation.

[0037] More specifically, the inlet inner diameter of the nozzle 8 is less than 1.2 mm, and the optimal flow rate q for each nozzle 8 to generate a jet ensures that the flow state out of the nozzle 8 is a jet state. Therefore, the outlet flow rate of the injection pump 19 is Q=nq, where n is the number of nozzles 8, which determines the outlet flow rate of the injection pump 19.

[0038] The heat exchange condensation system includes a heat exchanger 21, a condenser tube 24, and a fresh water collection bottle 26; the water vapor inlet of the heat exchanger 21 is connected to the atomizing heating evaporation chamber 11 through a pipeline, and the water vapor outlet of the heat exchanger 21 is connected to the condenser tube 24 and the fresh water collection bottle 26 in sequence. The steam generated in the atomizing heating evaporation chamber 11 is fully condensed into fresh water through the heat exchanger 21 and the condenser tube 24.

[0039] In this embodiment, the condenser 24 is placed in the condenser tank 25, and seawater is used as a heat exchange medium in both the condenser tank 25 and the heat exchanger 21. The seawater is pumped into the condenser tank 25, and the condenser tank 25 is connected to the heat exchanger 21 and the water storage heating tank 5 in sequence through pipelines. The condenser tank 25 and the heat exchanger 21 can be used to preheat the seawater in multiple stages, making full use of the waste heat of steam.

[0040] The re-evaporation system includes a low-concentration brine collection box 13 and a high-concentration brine collection box 16. The low-concentration brine collection box 13 is connected to the bottom of the atomizing heating evaporation chamber 11 to receive the low-concentration brine produced by the atomizing heating evaporation chamber 11. The low-concentration brine collection box 13 is also connected to the atomizing evaporation system to input the low-concentration brine into the atomizing evaporation system for secondary evaporation. The high-concentration brine collection box 16 is used to collect the high-concentration brine produced after the secondary evaporation.

[0041] In this embodiment, a pressure relief valve 12 is provided at the connection between the atomizing heating evaporation chamber 11 and the low-concentration brine collection box 13. When the brine in the evaporation heating chamber reaches a certain amount, the pressure relief valve 12 will reach a preset pressure and discharge the brine into the low-concentration brine collection box 13 in time. At the same time, the pressure relief valve 12 can prevent steam from entering the low-concentration brine collection box 13.

[0042] More specifically, the energy storage battery 4 is connected to the injection pump 19, the high-voltage electrostatic generator 7, the air pump 20, the water storage and heating box 5 of the atomization evaporation system and the heater in the atomization heating evaporation chamber 11. When the energy storage battery 4 is fully charged, it provides power to these devices and the system starts to run. At the same time, the photovoltaic energy storage system can also provide power to other equipment for lighting, etc. while being used.

[0043] More specifically, filter screens are provided at the inlet and outlet of the condensation tank 25 , and large particle impurities in the seawater are filtered out before the seawater enters the condensation tank 25 , so that the seawater meets the basic requirements of seawater distillation and desalination.

[0044] More specifically, the outer walls of the water storage and heating box 5 and the atomizing and evaporating chamber 11 need to be covered with an insulating and heat-preserving layer to reduce heat loss.

[0045] More specifically, the heat exchange condensation system also includes a constriction 9 and a waterproof breathable membrane 10 at the entrance of the constriction 9. The constriction 9 is located at the upper right inside the atomization evaporation chamber 11, and is connected to the water vapor inlet of the heat exchanger 21 through a pipeline and an air pump 20, so that the steam in the atomization heating evaporation chamber 11 can be extracted in time. At the same time, the waterproof breathable membrane 10 can separate the steam from the atomized droplets to prevent the atomized droplets from entering the heat exchange condensation system.

[0046] More specifically, the condenser 24 adopts a combination of a U-shaped structure and a Z-shaped structure. This condensation structure can improve the condensation efficiency of steam and prevent gas reflux. The outlet of the condenser is connected to a fresh water collection bottle 26 to collect the fresh water condensed from the steam.

[0047] The re-evaporation system further includes a pressure sensor 11 and a proportional valve 15. The pressure sensor 11 is located at the bottom of the low-concentration brine collection box 13. When the brine in the low-concentration brine collection box 13 is sufficient, the pressure sensor 11 will reach a preset pressure, control the first execution valve 22 to open, and the second execution valve 23 to close. The injection pump 19 only injects the brine in the low-concentration brine collection box into the atomization evaporation system for secondary desalination. The generated steam will pass through the heat exchange condensation system again and finally be collected in the fresh water collection bottle. The generated re-concentrated brine will be collected in the low-concentration brine collection box 13 again, and the seawater concentration in the low-concentration brine collection box 13 will gradually increase. The proportional valve 15 is located at the connection between the low-concentration brine collection box 13 and the high-concentration brine collection box 16. When the brine in the low-concentration brine collection box 13 is concentrated to the preset concentration of the proportional valve 15, the proportional valve 15 is opened to allow the brine with a higher concentration to enter the high-concentration brine collection box 16.

[0048] An interface 18 is provided at the lower left of the high-concentration brine collection box 16, and a valve 17 is provided at the interface. By opening the valve 17, highly concentrated seawater can be collected through the interface 18, which can be used as a chemical raw material and further used for the extraction and purification of sea salt.

[0049] The solar desalination system provided in this embodiment integrates a photovoltaic energy storage system, an atomization evaporation system, a heat exchange condensation system and a re-evaporation system. The photovoltaic energy storage system absorbs and stores solar energy to provide energy for the operation of the entire system and other electrical equipment, thereby achieving environmental protection and zero carbon emissions. The atomization evaporation system first heats the seawater and then performs electrostatic atomization treatment, so that the heated seawater is broken into droplets with an inner diameter of micrometers or even nanometers, which greatly increases the evaporation surface. At the same time, under the action of the electric field generated by the annular electrode, the evaporation rate of the seawater is greatly improved. The heat exchange condensation system absorbs steam in a timely manner, and can fully utilize the huge latent heat of the steam and condense it into fresh water for collection, so that the waste heat is fully utilized and the consumption of electricity is reduced. The re-evaporation system can re-evaporate the evaporated seawater to obtain brine with a higher concentration, which can be used to extract chemical raw materials. Moreover, compared with traditional seawater desalination technology, the system improves energy utilization and economic benefits.

[0050] like Figure 3The process of seawater desalination cogeneration in the above-mentioned solar seawater desalination cogeneration system is as follows: the photovoltaic energy storage system, the atomization evaporation system, the heat exchange condensation system and the re-evaporation system are integrated together, the photovoltaic energy storage system absorbs and stores solar energy to provide energy for the operation of the entire system and other electrical equipment; the atomization evaporation system uses the electric energy of the energy storage battery 4 to first heat the seawater, then electrostatically atomize it and finally evaporate it; the heat exchange condensation system promptly extracts the steam generated by the atomization evaporation system, and first performs heat exchange and then condensation, and finally collects the fresh water formed by the condensation; the re-evaporation system collects the brine generated in the atomization evaporation system, allows it to enter the atomization evaporation system again, and then obtains brine with a higher concentration.

[0051] The solar desalination cogeneration system and photovoltaic energy storage system in this application maximize the light intensity received by the photovoltaic panels, thereby improving the power generation efficiency, providing energy for the entire system operation and other electrical equipment, achieving environmental protection, zero carbon emissions, and good economic benefits.

[0052] The solar desalination cogeneration system in the present application uses an atomization evaporation system to heat the seawater first and then perform electrostatic atomization treatment, so that the heated seawater is broken into droplets with an inner diameter of micrometers or even nanometers, which greatly increases the evaporation surface area. At the same time, under the action of the electric field generated by the annular electrode, the evaporation rate of seawater is greatly improved.

[0053] The solar desalination cogeneration system and operation method in the present application ensures the demand for fresh water supply, while making full use of waste heat and reducing the consumption of electric energy.

[0054] The solar desalination cogeneration system in the present application obtains brine with a higher concentration, which can be used to extract chemical raw materials, thereby reducing the impact on the environment and improving economic benefits.

[0055] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A solar desalination cogeneration system, characterized in that: include: Photovoltaic energy storage system, atomization evaporation system, heat exchange condensation system and re-evaporation system; The atomization evaporation system comprises a water storage and heating box (5), an atomization and heating evaporation chamber (11), and an electrostatic atomization unit. The water storage and heating box (5) heats the input seawater. The electrostatic atomization unit is arranged between the water storage and heating box (5) and the atomization and heating evaporation chamber (11). The electrostatic atomization unit breaks the heated seawater in the water storage and heating box (5) into droplets with an inner diameter of micrometers or even nanometers, and sprays the droplets into the atomization and heating evaporation chamber (11). The droplets evaporate in the atomization and heating evaporation chamber (11) to obtain water vapor and low-concentration brine. The heat exchange condensation system condenses the water vapor generated by the atomization evaporation system into fresh water; The re-evaporation system inputs low-concentration brine into the atomization evaporation system for re-evaporation to obtain high-concentration brine; The photovoltaic energy storage system converts solar energy into electrical energy and supplies energy to electrical equipment in the atomization evaporation system, the heat exchange condensation system and the re-evaporation system.

2. A solar desalination cogeneration system according to claim 1, characterized in that: The atomizing heating evaporation chamber (11) is provided with a constriction (9), one side of the constriction (9) is provided with a waterproof breathable membrane (10), and the other side is connected to a heat exchange condensation system. The waterproof breathable membrane (10) is used to separate steam and atomized droplets and then input them into the heat exchange condensation system.

3. A solar desalination cogeneration system according to claim 1, characterized in that: The electrostatic atomization unit comprises a high-voltage electrostatic generator (7), an annular electrode (6) and a nozzle (8); the annular electrode (6) is connected to the high-voltage electrostatic generator (7) to form a high-voltage electric field around the annular electrode (6); the nozzle (8) is arranged at the center of the annular electrode (6); the inlet end of the nozzle (8) is connected to the water storage heating box (5), and the outlet end of the nozzle (8) faces the atomization heating evaporation chamber (11).

4. The solar desalination cogeneration system according to claim 1, characterized in that: The heat exchange condensation system comprises a heat exchanger (21), a condensation tube (24), and a fresh water collection bottle (26); the water vapor inlet of the heat exchanger (21) is connected to the atomization heating evaporation chamber (11) through a pipeline, and the water vapor outlet of the heat exchanger (21) is connected to the condensation tube (24) and the fresh water collection bottle (26) in sequence; the condensation tube (24) is placed in a condensation box (25).

5. A solar desalination cogeneration system according to claim 4, characterized in that: The condensing tank (25) is connected to the heat exchanger (21) and the water storage and heating tank (5) in sequence through pipelines. The condensing tank (25) and the heat exchanger (21) both use seawater as a heat exchange medium. The seawater is preheated in multiple stages by the condensing tank (25) and the heat exchanger (21) and then input into the water storage and heating tank (5).

6. The solar desalination cogeneration system according to claim 1, characterized in that: The re-evaporation system comprises a low-concentration brine collection box (13) and a high-concentration brine collection box (16); the low-concentration brine collection box (13) is connected to the bottom of the atomizing heating evaporation chamber (11) and is used to receive the low-concentration brine generated by the atomizing heating evaporation chamber (11); the low-concentration brine collection box (13) is also connected to the atomizing evaporation system to input the low-concentration brine into the atomizing evaporation system for secondary evaporation; the high-concentration brine collection box (16) is used to collect the high-concentration brine generated after the secondary evaporation.

7. The solar desalination cogeneration system according to claim 1, characterized in that: The photovoltaic energy storage system comprises a solar panel (1) and an energy storage battery (4). The solar panel (1) converts solar energy into electrical energy and is connected to the energy storage battery (4) via a wire so as to store the converted electrical energy. The energy storage battery (4) supplies energy to electrical equipment in the system.

8. The solar desalination cogeneration system according to claim 1, characterized in that: The photovoltaic energy storage system is equipped with an orientation adjustment system, and the orientation of the solar panel (1) is adjusted by the orientation adjustment system.

9. The solar desalination cogeneration system according to claim 1, characterized in that: The seawater inlet and outlet of the condensation tank (25) are both provided with filter screens.

10. The solar desalination cogeneration system according to claim 1, characterized in that: The outer walls of the water storage and heating box (5) and the atomization and evaporation chamber (11) are both covered with an insulating and heat-preserving layer.

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